import React from 'react';
import ReactDOM from 'react-dom';
import './style.scss'
// 计算谁是赢家
function calculateWinner(squares) {
    const lines = [
        [0, 1, 2],
        [3, 4, 5],
        [6, 7, 8],
        [0, 3, 6],
        [1, 4, 7],
        [2, 5, 8],
        [0, 4, 8],
        [2, 4, 6],
    ];
    for (let i = 0; i < lines.length; i++) {
        const [a, b, c] = lines[i];
        if (squares[a] && squares[a] === squares[b] && squares[a] === squares[c]) {
            return squares[a];
        }
    }
    return null;
}


function Square(props) {
    return (
        <button className="square" onClick={() => {
            props.onClick()
        }}>
            {props.value}
        </button>
    )
}


// 棋盘
// class Board extends React.Component {
//     constructor(props) {
//         super(props);
//         this.state = {
//             squares: Array(9).fill(null),
//             xIsNext: true,
//         }
//     }
//
//     handleClick(i) {
//         const squares = this.state.squares.slice();
//
//         if (calculateWinner(squares) || squares[i]) {
//             return;
//         }
//         squares[i] = this.state.xIsNext ? 'X' : 'O';
//
//         this.setState({
//             squares: squares,
//             xIsNext: !this.state.xIsNext
//         })
//     }
//
//     // 渲染小方块
//     renderSquare(i) {
//         // return <Square value={i}/>;
//         return <Square
//             value={this.state.squares[i]}
//             onClick={() => this.handleClick(i)}
//         />
//     }
//
//     render() {
//         const winner = calculateWinner(this.state.squares);
//         let status;
//
//         if (winner) {
//             status = 'Winner: ' + winner;
//         } else {
//             status = 'Next player: ' + (this.state.xIsNext ? 'X' : 'O');
//         }
//
//         return (
//             <div>
//                 <div className="status">{status}</div>
//                 <div className="board-row">
//                     {this.renderSquare(0)}
//                     {this.renderSquare(1)}
//                     {this.renderSquare(2)}
//                 </div>
//                 <div className="board-row">
//                     {this.renderSquare(3)}
//                     {this.renderSquare(4)}
//                     {this.renderSquare(5)}
//                 </div>
//                 <div className="board-row">
//                     {this.renderSquare(6)}
//                     {this.renderSquare(7)}
//                     {this.renderSquare(8)}
//                 </div>
//             </div>
//         );
//     }
// }


class Board extends React.Component {
    // handleClick(i) {
    //     const squares = this.state.squares.slice();
    //     if (calculateWinner(squares) || squares[i]) {
    //         return;
    //     }
    //     squares[i] = this.state.xIsNext ? 'X' : 'O';
    //     this.setState({
    //         squares: squares,
    //         xIsNext: !this.state.xIsNext,
    //     });
    // }

    renderSquare(i) {
        return (
            <Square
                value={this.props.squares[i]}
                onClick={() => this.props.onClick(i)}
            />
        );
    }

    render() {
        // const winner = calculateWinner(this.state.squares);
        // let status;
        // if (winner) {
        //     status = 'Winner: ' + winner;
        // } else {
        //     status = 'Next player: ' + (this.state.xIsNext ? 'X' : 'O');
        // }

        return (
            <div>
                {/*<div className="status">{status}</div>*/}
                <div className="board-row">
                    {this.renderSquare(0)}
                    {this.renderSquare(1)}
                    {this.renderSquare(2)}
                </div>
                <div className="board-row">
                    {this.renderSquare(3)}
                    {this.renderSquare(4)}
                    {this.renderSquare(5)}
                </div>
                <div className="board-row">
                    {this.renderSquare(6)}
                    {this.renderSquare(7)}
                    {this.renderSquare(8)}
                </div>
            </div>
        );
    }
}


class Game extends React.Component {
    constructor(props) {
        super(props);
        this.state = {
            history: [{
                squares: Array(9).fill(null),
            }],
            stepNumber: 0,
            xIsNext: true,
        };
    }

    handleClick(i) {
        // 这里的stepNumber记得要加一
        const history = this.state.history.slice(0, this.state.stepNumber + 1);

        const current = history[history.length - 1];
        const squares = current.squares.slice();

        if (calculateWinner(squares) || squares[i]) {
            return;
        }
        squares[i] = this.state.xIsNext ? 'X' : 'O';

        // 更新data
        this.setState({
            history: history.concat([{
                squares: squares,
            }]),
            stepNumber: history.length,
            xIsNext: !this.state.xIsNext,
        });
        // this.setState({
        //     squares: squares,
        //     xIsNext: !this.state.xIsNext,
        // });
    }

    jumpTo(step) {
        this.setState({
            stepNumber: step,
            xIsNext: (step % 2) === 0
        })
    }

    render() {
        const history = this.state.history;

        // 当前棋盘
        const current = history[this.state.stepNumber];

        // 胜者
        const winner = calculateWinner(current.squares);

        const moves = history.map((step, move) => {
            const desc = move ?
                'Go to move #' + move :
                'Go to game start';
            return (
                <li key={move}>
                    <button onClick={() => this.jumpTo(move)}>{desc}</button>
                </li>
            );
        });


        let status;
        if (winner) {
            status = 'Winner: ' + winner;
        } else {
            status = 'Next player: ' + (this.state.xIsNext ? 'X' : 'O');
        }

        // const myHistoryShow = history.map()
        const myHistoryShow = history.map((step, move,) => {

            return (
                <div className="my-show-history-item" key={move}>
                    {/*<button onClick={() => this.jumpTo(move)}>{desc}</button>*/}
                    <Board
                        squares={step.squares}
                        onClick={() => this.jumpTo(move)}
                    />
                </div>
            );
        });

        return (
            <div className="my-game" id="id-my-game">
                <div className="game">
                    <div className="game-board">
                        <Board
                            squares={current.squares}
                            onClick={(i) => this.handleClick(i)}
                        />
                    </div>
                    <div className="game-info">
                        <div>{status}</div>
                        <ol>{moves}</ol>
                    </div>
                </div>
                <div className='my-show-history'>
                    {myHistoryShow}
                </div>

            </div>
        );

        // return (
        //     <div className="game">
        //         <div className="game-board">
        //             <Board/>
        //         </div>
        //         <div className="game-info">
        //             <div>{/* status */}</div>
        //             <ol>{/* TODO */}</ol>
        //         </div>
        //     </div>
        // );
    }
}


export default Game;